(CNN) -- Authorities say one person has been injured and another is dead in a shooting Friday at Arapahoe High School in Centennial, Colorado, Sheriff Grayson Robinson told CNN affiliate KMGH.
At least one person -- a minor -- has been taken to Littleton Adventist Hospital with a gunshot wound, Lauren Brendel, a hospital spokeswoman, told CNN. The age, gender and condition of the minor were not immediately released.
The suspect in the shooting at Arapahoe High School is dead from what appears to have been a self-inflicted gunshot wound, Sheriff Grayson Robinson told reporters.
Dozens of children could be seen walking away from the school, with their hands in the air. Some stood in lines at what appeared the high school track field, where they appeared to be undergoing police pat-downs.
Parents were being asked to go to an area church, Shepherd of the Hills, to meet their children, the sheriff said.
The high school, with a student population of 2,229 students, has 70 classrooms. The school, which was built in 1964, is part of the Littleton Public Schools system.
All schools in the system have been put on lock down, authorities said.
Outside Arapahoe High School, police blocked roads leading to the campus.
The school is about 10 miles from Littleton, where Eric Harris and Dylan Klebold killed 12 students and one teacher in a rampage at Columbine High School in April 1999.